CN1922393A - Oil/coolant module with coolant treatment system - Google Patents

Abstract

The invention relates to an oil/coolant module for an internal combustion engine, comprising an oil filter, an oil/water heat exchanger and a coolant pump called the water pump, whereby a coolant treatment system is provided with a so-called water filter and which contains treatment means, which, on assembly or servicing the coolant treatment means, automatically enters the coolant circuit.

Description

Oil-coolant-module with coolant care system

technical field

The invention relates to an oil-coolant module according to the preamble of claim 1 and a filter insert suitable therefor. The coolant of the internal combustion engine is also called "cooling water" or "water" in short and simplified form within the framework of the present invention.

Background technique

Such an oil-coolant module is known from practice.

An oil-coolant module for an internal combustion engine is known from EP 898 060 B1, which has an oil filter and an oil/water-heat exchanger.

The two known oil-coolant modules described above are correspondingly a maintenance unit for the oil of an internal combustion engine, since on the one hand the quality of the oil is guaranteed by the oil filter and on the other hand its optimum oil is generated by the heat exchanger. Operating temperature: Since the cooling water heats up faster than the oil, the oil/water-heat exchanger is used to heat the oil after the engine starts, so that it reaches its optimal operating temperature as quickly as possible. Since the cooling water is then cooled to below the maximum permissible oil temperature by means of a cooler located in the coolant circuit, the oil is cooled by the heat exchanger during further engine operation so that it can be kept reliably at within its specified temperature range.

Contents of the invention

The object of the invention is to improve a similar oil-coolant module in such a way that it can be realized by a high degree of integration,

- keeping the required space of the internal combustion engine, especially its peripheral components, as small as possible,

- increase the operational reliability of the engine by minimizing the number of joints between individual components that need to be sealed,

- provide as much design freedom as possible to the designer of the internal combustion engine or of the vehicle containing the internal combustion engine, and

- For maintenance personnel, the accessibility of components of the internal combustion engine requiring maintenance is simplified.

Furthermore, it is an object of the invention to specify a filter insert which is particularly well suited for use in such an oil-coolant module.

The above object is solved by an oil-coolant module with the features of claim 1 and by a filter insert with the features of claim 29 .

In other words, the invention proposes to integrate a coolant maintenance system into the oil-coolant module. The oil-coolant module thus becomes a central service unit for the engine-related fluids, ie for water and for oil, which can be serviced and maintained at a central location. Furthermore, the additional placement of the coolant maintenance system in the oil-coolant module has the following advantages:

- The size of the flow channel for water can be shortened. The required space is reduced because no external piping needs to be laid.

- The integration of the flow channels into the oil-coolant module not only reduces flow losses due to flow resistance, but also reduces potential leak points due to the integration into a single housing.

- The accessibility of the respective components during maintenance work can be improved, since both the maintenance components for the oil and the maintenance components for the coolant are now accessible at a single, easily accessible location.

- Improvement of the structural design freedom of, for example, the engine compartment of a motor vehicle, since the accessibility of maintenance components for engine fluids only has to be considered at the one above-mentioned position, while at other positions it is better to use an available installation space.

The coolant maintenance system provided according to the invention has a water filter and maintenance additives, known as rust inhibitors, which are used, for example, as corrosion and frost protection in the cooling water. They can be, for example, solid tablets which dissolve in a coolant and which release a soluble rust inhibitor, or maintenance additives which can be present in a closed, liquid-tight cartridge inside the shell.

Before the care additive is introduced into the coolant circuit, a possibly provided envelope, which protects the solid tablet from moisture, for example, or which is originally intended for liquid care additives as mentioned above, can be opened by hand in the form of a shell.

However, it can be particularly advantageous if the envelope is opened automatically when it is introduced into the oil-coolant module, so that maintenance additives are automatically introduced into the coolant circuit. It is thus ensured that the maintenance additive contained in the envelope enters the coolant circuit. Furthermore, contact of the user's skin with care additives can be reliably prevented in this way. In order to open the envelope automatically when it is introduced into the oil-coolant module, for example, an interference contour (Störkontur) can be provided in the oil-coolant module, which destroys the envelope and opens in this way encapsulation.

Advantageously, it can be provided that the maintenance additive is actuated manually together with a filter element of the water filter. Space and the number of necessary components can thus be saved compared to an otherwise necessary separate opening with its own sealing cap for inserting the service additive into the oil-coolant module. Furthermore, it can be ensured that the maintenance additive is evenly incorporated into the coolant system when the filter element is inserted into the water filter. The maintenance additive is first introduced into the cooling water system together with the filter element when assembling the coolant maintenance system, and is also replaced every time the filter is changed by using a new filter element filled with anti-corrosion agent The maintenance additive.

In the case of a filter element which is, for example, approximately hollow cylindrical, the maintenance additive can be arranged in the hollow interior of the filter element.

Preferably, an auxiliary circuit oil filter can be provided, which is advantageously designed in a known manner as a centrifugal separator. The auxiliary oil circuit oil filter provides particularly reliable oil filtration.

Preferably, the auxiliary oil circuit oil filter can be arranged in the same housing as the main oil circuit oil filter. The two oil filter arrangements can thus be arranged in a space-saving manner and the arrangement of the individual oil channels is simplified when designing the housing of the oil-coolant module.

Advantageously, a cooling water thermostat can be provided and integrated into the oil-coolant module, so that a large or small cooling water circuit is connected via the thermostat in a known manner. The integration of the thermostat into the oil-coolant module reduces the number of hose connections that would otherwise be necessary. In particular, by arranging the thermostat on the inlet side, the space in the oil-coolant module can be used optimally, and in this way it is possible to avoid in the oil-coolant module what would otherwise be provided. Useless cavity.

Advantageously, a connection can be provided for the fuel temperature regulator, ie for fuel preheating or for fuel cooling, so that either the heated cooling water of the internal combustion engine preheats the fuel at low external temperatures and can, for example, be liquefied The paraffinic fraction (paraffinierte Anteile) of diesel, or at high engine power and high external temperatures, cools the fuel in the engine compartment and prevents the formation of vapor bubbles in the fuel.

Advantageously, a connection for cabin heating can be provided on the oil-coolant module, so that hot water for heating the vehicle interior can be obtained when the internal combustion engine is used in the vehicle.

Advantageously, a connection for cooling an air compressor, for example for the brakes of a truck, can be provided on the oil-coolant module.

Finally, the degree of integration of the oil-coolant module can be particularly high in that a connection to the coolant compensation tank is provided.

The last-mentioned connection saves most of the branching points that would otherwise normally be provided, for example, in hoses, and thus reduces the risk of leakage points, thus resulting in a coolant system that is particularly reliable in operation and most likely avoids Environmentally damaging emissions due to leaks, as the number of hoses and corresponding hose connection points can be reduced.

Advantageously, a connection for a cooling device of a generator of an internal combustion engine can be provided, so that such a generator can also be arranged in a thermally unfavorable environment, and correspondingly in order to optimize space utilization, a generator can be installed in a compact Installation in the installation space is also possible in the vehicle.

Advantageously, the thermostat arranged in the oil-coolant module can be designed as an annular slide valve, unlike the otherwise known disk valves, for example. The design of the ring slide valve enables a particularly advantageous and space-saving routing of the flow channel, so that the structural dimensions of the oil-coolant module can be kept small.

Filling openings are preferably provided both for the engine oil and for the coolant, so that the oil-coolant module can be designed as a maintenance point in the engine compartment and can be arranged at an easily accessible position, on the one hand, it can replenish Fill with cooling water and on the other hand check the oil level and, if necessary, refill the engine oil.

It is advantageous if oil and water can be conducted diagonally and convectively in the heat exchanger of the oil-coolant module. This results in an optimally long path for the liquid and thus an optimally long residence time in the heat exchanger, which enables a particularly intensive heat exchange.

Advantageously, a connection leading into the crankcase of the internal combustion engine can be provided on the oil-coolant module, wherein a plurality of return lines are assembled in the single connection—that is, in a single opening, the The return line of the oil-coolant module otherwise has a separate channel. Here, for example, a return line can lead from an auxiliary line oil filter to the connection mentioned, the same drain line from the main oil filter and the same filling channel from the above-mentioned oil filling An opening leads to the said connection, and the drain pipe enables residual oil to be drained from the filter housing, for example, when changing the filter element. Due to the plurality of lines or channels leading to a single joint opening, the number of points to be sealed is reduced, which improves the performance of the oil-coolant module or the internal combustion engine equipped with the oil-coolant module. work reliability.

Advantageously, several lines can also be combined on the coolant side into a single connection, ie a single outlet or a single inlet. On the pressure side, for example, connections for cooling the exhaust gas recirculation system or for regulating the fuel temperature can be provided, wherein other assemblies can also be provided in addition to the two above-mentioned devices, which can be cooled by means of cooling water. cool down.

On the suction side of the water pump, for example, the connections for the cooling of the air compressor or of the cooling of the generator are combined into a single inlet. The suction side of the water pump can preferably only be integrated into the oil-coolant module, so that the suction pressure of the water pump exists only in the oil-coolant module and all functions of the internal combustion engine that need to be returned to the suction side of the water pump are connected to the oil - Coolant - on one channel within the module or merged into a single channel. They can be, for example, heating installations, supply tank filling lines, water-carrying channels for air compressors.

It is advantageous if the pressure side and the suction side of the water pump are separated by only one wall, so that the water filter can be integrated very easily into the oil-coolant module.

Description of drawings

An exemplary embodiment of the invention is explained in more detail below with the aid of a schematic diagram. in:

Figure 1-6 Different partial perspective views of the oil-coolant module,

Figure 7 Sectional view of the coolant maintenance system area,

Fig. 8 Working principle diagram of engine oil-coolant-module.

Detailed ways

In the drawing, a so-called oil-coolant module is designated 1 as a whole, which has a central housing 2 which also forms an oil filter 3 and a coolant service Cup-shaped housing for system 4. The housing 2 has a lateral connecting surface 5 with which it can be connected to the engine block of an internal combustion engine.

On the front side, the housing 2 forms a space for accommodating the pump impeller of the water pump. The water pump housing is separately designated 6 as part of the housing 2 . The water pump is driven, for example electrically or in a known manner, from the crankshaft end of the internal combustion engine via a multi-groove V-belt pulley and a belt.

A heat exchanger 7 is provided in the region of the connecting surface 5, in which heat exchange takes place between the engine oil and the cooling water of the internal combustion engine, a plurality of flow channels for the engine oil and water being provided inside the housing 2, and Thus, the cooling water flow is guided from the water pump into the heat exchanger 7 .

A sectional view of a coolant maintenance system 4 can be seen in FIG. 7 . The coolant maintenance system has an inlet 8 for unfiltered cooling water and a return 9 for filtered cooling water, wherein inside the coolant maintenance system 4 the cooling water flows through a replaceable filter insert 10, The filter element is connected to a cover 11 of the coolant maintenance system 4 by snap-fitting. In the region of the return opening 9 there is a non-return valve 12 which, as a ball-shaped valve body, allows clean cooling water to flow out of the interior of the filter element 10 . If a higher pressure prevails in the rest of the coolant circuit than inside the coolant care system 4 , the ball closes the return opening 9 to the interior of the coolant care system 4 .

In the inlet 8 there is also a shut-off valve 14, however this shut-off valve is not pressure-controlled but path-controlled: the filter element 10 is pressed against a push rod 16 with a lower end disk 15, which is connected to the shut-off valve The valve body 17 of 14 is moved together so that it is positively spaced from its associated valve seat 18 .

When the cover 11 with the filter insert 10 is unscrewed from the housing of the coolant maintenance system 4 , the indirect loading of the valve body 17 via the filter insert 10 is canceled and the shut-off valve 14 is closed. The closing movement occurs either because the valve body 17 is pressed against the valve seat 18 by means of a spring 19, or because there is a higher pressure in the rest of the coolant circuit than in the inner space of the coolant maintenance system 4, i.e. when, for example, cooling When the agent has an operating temperature and is thus under pressure.

A relatively long overlapping area between the cover 11 and the housing of the coolant maintenance system 4 and a seal 20 at a sufficient distance from the upper edge of the housing ensure that the seal 20 Before reaching the upper edge of the cup-shaped housing of the coolant maintenance system 4, the shut-off valve 14 is closed, thus reliably preventing hot and possibly pressurized coolant from flowing out: first, when the shut-off valve 14 and, if necessary, the non-return valve 12 is closed, the effect of the seal 20 disappears; secondly, the internal pressure relief of the coolant maintenance system 4 takes place in such a way that an extrusion body 21 formed on the cover 11 confines the liquid inside the coolant maintenance system 4 Volume, so that when the cover 11 is removed, the liquid level in the coolant maintenance system 4 drops, because the extrusion body 21 is gradually removed from the inner space of the coolant maintenance system 4, that is, it is screwed out together with the cover 11. The same applies to the volume of the filter element 10 when the cover 11 is unscrewed, which is gradually removed from the cup-shaped housing of the coolant maintenance system 4, so that as soon as the seal 20 reaches the upper edge of the housing, it is reliably excluded. The coolant maintains a positive pressure inside the system 4 .

The oil filter 3 also has a cup-shaped housing. Compared to the coolant maintenance system 4 , the cup-shaped housing is designed to be relatively short, so that a significantly greater part of the overall height of the oil filter 3 is formed by the cover 22 . The cover 22 includes an auxiliary oil circuit oil filter, the auxiliary oil circuit oil filter is designed as a centrifuge, and its rotor is replaced together with the filter element of the oil filter 3 during maintenance.

Several connections are provided on the side of the oil-coolant module 1 opposite the connecting surface 5, for example a connection 23 for the return flow of the compartment heating system, or a screw plug according to FIG. 6 for connecting a Fitting 24 for the filler pipe connector. For the exemplary embodiment shown, it can optionally be provided that, depending on the position and accessibility of the oil-coolant module 1 , for example in the engine compartment of the motor vehicle or as a free power/thermal assembly, the oil-coolant module 1 itself constitutes a filler pipe connection.

In FIG. 4 , a connection for the return of the fuel oil preheater is marked 25 and a connection for the coolant preheater is marked 26 , wherein the preheater can be heated, for example, by means of electric or fuel-operated auxiliary heating. implement.

Furthermore, in FIG. 4 a connection is designated 27 for the initial fueling of the internal combustion engine, and a connection for the return flow of an air compressor is designated 28 .

In FIG. 5 , a connection for the filling line of the coolant compensation tank is marked with 29 , and a connection for the inlet port of the cooling device of an exhaust gas recirculation system is marked with 30 . The housing formed by housing 2 of a cooling water thermostat is denoted 31 in FIG. 4 .

FIG. 3 shows a view similar to FIG. 1 , but with the heat exchanger 7 removed. The housing 2 of the oil-coolant module 1 has a large number of inlet and outlet openings for water and oil: one opening is marked 46 through which the water for the small cooling circuit, ie the short-circuit circuit, enters the oil-coolant - within module 1. One opening is marked 47 through which hot, unfiltered oil can enter the heat exchanger 7 . One opening is designated 48 , which can be referred to as the main return, and through which unpressurized oil can flow into the crankcase of the internal combustion engine. The cooled oil passes from the heat exchanger 7 through the opening 49 into the oil-coolant module 1 and into the oil filter 3 , wherein the filtered clean oil then passes through the opening 50 into the housing of the internal combustion engine and from there There to the various lubrication points. An opening is designated 51 through which oil can flow from a drain valve of the oil filter 3 into the crankcase of the engine.

The oil flowing through the opening 47 into the heat exchanger 7 is neither cooled nor filtered. A partial flow of said oil can enter through the opening 52 into the auxiliary oil circuit oil filter. By avoiding this partial flow through the heat exchanger and thus causing a smaller pressure loss before reaching the centrifuge of the auxiliary oil filter, more power energy can also be used on the centrifuge for the separation action, so that The described auxiliary circuit oil filter produces better efficiency.

The cooling water flows along the arrow marked 53 into the housing 2 of the oil-coolant module 1 and diverts in front of a partition 54 into the heat exchanger 7 . The cooling water flows out of the heat exchanger 7 and into the large-area opening 55 through which the cooling water flows out of the housing 2 of the oil-coolant module 1 .

FIG. 8 shows a diagram of the principle of operation of the oil-coolant module 1 . The inlet for dirty, unfiltered oil (Rohl) is designated 32 , which enters the heat exchanger 7 and from there into the oil filter 3 . The dirty oil flows through the filter insert 10 and reaches the clean oil outlet, which is indicated by reference numeral 33 . When the filter element 10 is clogged, dirty oil can bypass the filter element 10 by means of the filter bypass valve 34 and then reach the outlet 33 . As soon as a sufficient minimum pressure is present and a minimum pressure valve 36 is opened, a partial flow of unfiltered dirty oil flows through the auxiliary circuit oil filter 35 . When the pressure is lower than the minimum pressure, all the oil quantity is passed in the oil filter 3.

The oil filter 3 can be completely emptied via an oil drain valve 37 , for example when replacing the filter insert 10 , so that the filter insert 10 can be removed from the oil filter housing with as few oil droplets as possible. One connection is marked 45, which is connected to the oil sump of the internal combustion engine and into which said unfiltered oil passes. If the oil-coolant module 1 has a corresponding filling opening for fresh oil, the fresh oil that is also to be introduced into the engine enters the crankcase of the engine via said connection 45 .

In addition to the above-mentioned channels for the oil circulation, the oil-coolant module 1 also conducts cooling water: a water pump is designated by reference numeral 38 . The cooling water reaches the suction side of the pump either through a small circuit marked 39 or through a large circuit marked 40 through the water cooler, where a cooling water thermostat 41 opens one of the two circuits 39 or 40 depending on the temperature , and turn on the water pump 38. The water passes through the heat exchanger 7 on the pressure side of the water pump 31, wherein a part of the cooling water quantity is recirculated through the filter of the coolant maintenance system 4, while the remaining part of the cooling water flows out at a cooling water outlet 42 for engine cooling, For example, it flows into the engine housing, to which the oil-coolant module 1 is flanged.

The various connections and a connection 43 for a temperature sensor are shown schematically at the left edge of the oil-coolant module 1 . Furthermore, the oil-coolant module 1 has a connection 27 for the vehicle manufacturer to fill the oil-coolant module 1 with engine oil for the first time.

Claims (29)

1. machine oil-freezing mixture-module that is used for internal-combustion engine, comprise an oil filter, a machine oil/water-heat exchanger and a coolant pump that is referred to as water pump, it is characterized in that: a coolant treatment system (4) is arranged, this coolant treatment system has a so-called water filler, and this coolant treatment system comprises the maintenance additive that is used for circulate coolant.

2. machine oil-freezing mixture according to claim 1-module is characterized in that: the maintenance additive is designed to solid tablet, and described solid tablet comprises the rust preventing agent that can dissolve in freezing mixture.

3. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: the maintenance additive is arranged in a barrel shell sealing, liquid seal.

4. according to claim 2 or 3 described machine oil-freezing mixture-modules, it is characterized in that: the maintenance additive be arranged on a sealing, in the sealing of liquid seal.

5. machine oil-freezing mixture according to claim 4-module is characterized in that: described sealing constitutes with machine oil-freezing mixture-module adaptively, opens automatically so that this is encapsulated in when being presented in machine oil-freezing mixture-module.

6. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: the maintenance additive can connect manually with the filter core of water filler, so that this maintenance additive enters in the circulate coolant in filter core is presented to machine oil-freezing mixture-module (1) time automatically.

7. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: an auxiliary oil circuit oil filter (35) is arranged.

8. machine oil-freezing mixture according to claim 7-module is characterized in that: auxiliary oil circuit oil filter (35) is arranged in the same housing with oil filter (3).

9. according to claim 7 or 8 described machine oil-freezing mixture-modules, it is characterized in that: auxiliary oil circuit oil filter (35) is designed to centrifugal separator.

10. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: a water pump (38) is arranged, wherein the suction side of water pump (38) and on the pressure side and the joint suction side of water cycle and/or on the pressure side be located in machine oil-freezing mixture-module (1); And a thermostat (41) arranged, this thermostat is arranged on inlet side, just in the suction side of water pump (38), and constitute make this thermostat depend on coolant temperature or under the situation of avoiding a coolant chiller, connect one less, be referred to as short-circuit cycle, the circulate coolant of leading to water pump (38), perhaps connect one bigger, by coolant chiller, the circulate coolant of leading to water pump (38), wherein be provided with a short-channel that leads to thermostat (41) in machine oil-freezing mixture-module (1), this short-channel constitutes a section of short-circuit cycle.

11., it is characterized in that: a joint (25) that is used for the fuel-firing preheating device is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

12., it is characterized in that: a joint (23) that is used for the occupant compartment heating installation is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

13., it is characterized in that: a joint (28) that is used for the air compressor cooling unit is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

14., it is characterized in that: a joint (29) that leads to the freezing mixture compensating tank is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

15., it is characterized in that: a joint (43) that leads to temperature transducer is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

16., it is characterized in that: there is one to be used for the joint (27) of annotating first to machine oil-freezing mixture-module (1) or internal-combustion engine according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

17., it is characterized in that: a joint (30) that is used for the cooling unit of gas recirculation system is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

18., it is characterized in that: a joint (25) that is used for the fuel oil temperature controlling device is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

19., it is characterized in that: a joint (24) that is used to install the oil filling pipe joint is arranged according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

20., it is characterized in that: an oil filling pipe joint that is made of machine oil-freezing mixture-module (1) is arranged according to the described machine oil-freezing mixture of one of claim 1 to 18-module.

21. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: a joint that is used for the cooling unit of generator is arranged.

22. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: thermostat (41) is designed to annular guiding valve.

23. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: be provided with the filling opening that is used for machine oil and freezing mixture.

24., it is characterized in that: at these two kinds of liquid of heat exchanger (7) inner opposite angle line ground convection current ground guiding according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

25. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: a joint (45) that leads to crank case of internal combustion engine is arranged, wherein a plurality of passages lead to this joint (45) in machine oil-freezing mixture-module (1), and described passage is used as the reflow pipe of auxiliary oil circuit oil filter (35), the escape pipe of oil filter (3) and the injection channel of oiling opening.

26. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: each joint that is located on the coolant pressure side of machine oil-freezing mixture-module (1) merges to a unique passage as the joint (30) of the cooling unit that is used for gas recirculation system and the joint (25) that is used for the fuel oil temperature controlling device, and this passage has a unique outlet on machine oil-freezing mixture-module (1).

27. according to the described machine oil-freezing mixture of above-mentioned any one claim-module, it is characterized in that: be located on the freezing mixture suction side of machine oil-freezing mixture-module (1) joint as the joint (28) of the cooling unit that is used for air compressor or as the joint that is used for the cooling unit of generator merge to a unique passage, this passage has a unique import on machine oil-freezing mixture-module (1).

28., it is characterized in that: be used on the pressure side only separating of water pump (38) by a wall with the passage of suction side according to the described machine oil-freezing mixture of above-mentioned any one claim-module.

29. filter core that is used for the water filler of machine oil-freezing mixture-module of constituting by above-mentioned any one claim, wherein can connect manually, so that this maintenance additive enters in the circulate coolant in filter core is presented to machine oil-freezing mixture-module (1) time automatically by the maintenance additive of claim 6 filter core with water filler.

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